There are 4 red and 3 black discs. Sophie and Emma are playing a game in which they take turns drawing a disc and replacing it.
To win the game, Sophie must draw a red disc and for Emma to win she must draw a black disc.
They continue taking turns until there is a winner. Sophie goes first.
What's the prob that Sophie wins the game?
Im getting 28/37 by summing an infinite series. Is this right?
Thanks
To win the game, Sophie must draw a red disc and for Emma to win she must draw a black disc.
They continue taking turns until there is a winner. Sophie goes first.
What's the prob that Sophie wins the game?
Im getting 28/37 by summing an infinite series. Is this right?
Thanks